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Natasha2012 [34]

3 years ago

6

When you light a fireplace what energy transformation occurs?

1 answer:

snow_tiger [21]3 years ago

4 0

<span>thermal energy

hope this helped</span>

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Name given to a negatively charged atom?

monitta

An anion is a negatively charged particle.

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3 years ago

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How much energy is absorbed when a 50.0 gram magnesium strip is heated from 45 degrees to 90 degrees

Leno4ka [110]

Quantity of heat energy required for change of phase= (mass) x (heat of fusion or heat of vaporization), or in equation form Q=mL. Heat of fusion=80cal/g; heat of vaporization=540 cal/g
quanity of heat energy responsible for a temperature change= (mass) x (specific heat) x (change in temperature), or in equation form, Q=mcT

Here's another way to calculate it

Calculate the energy absorbed by 20 grams of 100 C water that is turned into 100 C steam
Q=(20g)(540 cal/g)=10,800 cal

I hope this helps you.

7 0

3 years ago

Muiltplying 2.5 x 10^10 by 3.5 x 10^-7

andrey2020 [161]

<u>Answer: </u>

The value of $\left(2.5 \times 10^{10}\right) \times\left(3.5 \times 10^{-7}\right)$ is 8750

<u>Solution: </u>

$\left(2.5 \times 10^{10}\right) \times\left(3.5 \times 10^{-7}\right)$

$\Rightarrow\left(2.5 \times 10^{10} \times 3.5 \times 10^{-7}\right)$

$\Rightarrow\left(2.5 \times 3.5 \times\left(10^{10} \times 10^{-7}\right)\right)$

$\Rightarrow(2.5 \times 3.5) \times\left(10^{10+(-7)}\right)$

$\Rightarrow(2.5 \times 3.5) \times\left(10^{10+(-7)}\right)$

$\Rightarrow(2.5 \times 3.5) \times 10^{3}$

$\Rightarrow 8.75 \times 10^{3}$

$\Rightarrow 8.75 \times 1000=8750$

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3 years ago

Oooooooooooooooooooooooooooooooooooooooo

cupoosta [38]

Oooooooooooooooooooooooooooo

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3 years ago

how many moles of NaCl are dissolved in 250 mL of solution if the solution concentration is 0.150 M?

aliya0001 [1]

What lol I am just answering so I can get points :)

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